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/* |
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* Written by members of JCP JSR-166 Expert Group and released to the |
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* public domain. Use, modify, and redistribute this code in any way |
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* without acknowledgement. Other contributors include Andrew Wright, |
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* Jeffrey Hayes, Pat Fischer, Mike Judd. |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.util.concurrent.BrokenBarrierException; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.concurrent.CyclicBarrier; |
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import java.util.concurrent.TimeoutException; |
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import java.util.concurrent.atomic.AtomicBoolean; |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
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|
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public class CyclicBarrierTest extends JSR166TestCase{ |
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|
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public class CyclicBarrierTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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junit.textui.TestRunner.run(suite()); |
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} |
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|
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|
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public static Test suite() { |
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return new TestSuite(CyclicBarrierTest.class); |
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return new TestSuite(CyclicBarrierTest.class); |
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} |
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|
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public void testConstructor1(){ |
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try{ |
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|
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private volatile int countAction; |
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private class MyAction implements Runnable { |
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public void run() { ++countAction; } |
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} |
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|
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/** |
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* Spin-waits till the number of waiters == numberOfWaiters. |
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*/ |
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void awaitNumberWaiting(CyclicBarrier barrier, int numberOfWaiters) { |
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long startTime = System.nanoTime(); |
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while (barrier.getNumberWaiting() != numberOfWaiters) { |
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if (millisElapsedSince(startTime) > LONG_DELAY_MS) |
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fail("timed out"); |
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Thread.yield(); |
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} |
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} |
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|
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/** |
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* Creating with negative parties throws IAE |
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*/ |
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public void testConstructor1() { |
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try { |
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new CyclicBarrier(-1, (Runnable)null); |
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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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public void testConstructor2(){ |
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try{ |
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/** |
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* Creating with negative parties and no action throws IAE |
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*/ |
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public void testConstructor2() { |
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try { |
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new CyclicBarrier(-1); |
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fail("should throw"); |
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} catch(IllegalArgumentException e){} |
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shouldThrow(); |
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} catch (IllegalArgumentException success) {} |
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} |
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|
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public void testConstructor3(){ |
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/** |
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* getParties returns the number of parties given in constructor |
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*/ |
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public void testGetParties() { |
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CyclicBarrier b = new CyclicBarrier(2); |
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assertEquals(2, b.getParties()); |
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assertEquals(2, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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|
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public void testSingleParty() { |
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try { |
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CyclicBarrier b = new CyclicBarrier(1); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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catch(Exception e) { |
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fail("unexpected exception"); |
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} |
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} |
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|
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private volatile int countAction; |
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private class MyAction implements Runnable { |
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public void run() { ++countAction; } |
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/** |
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* A 1-party barrier triggers after single await |
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*/ |
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public void testSingleParty() throws Exception { |
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CyclicBarrier b = new CyclicBarrier(1); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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} |
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|
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public void testBarrierAction() { |
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try { |
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countAction = 0; |
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CyclicBarrier b = new CyclicBarrier(1, new MyAction()); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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assertEquals(countAction, 2); |
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} |
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catch(Exception e) { |
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fail("unexpected exception"); |
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} |
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/** |
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* The supplied barrier action is run at barrier |
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*/ |
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public void testBarrierAction() throws Exception { |
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countAction = 0; |
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CyclicBarrier b = new CyclicBarrier(1, new MyAction()); |
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assertEquals(1, b.getParties()); |
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assertEquals(0, b.getNumberWaiting()); |
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b.await(); |
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b.await(); |
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assertEquals(0, b.getNumberWaiting()); |
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assertEquals(countAction, 2); |
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} |
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|
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|
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public void testTwoParties(){ |
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/** |
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* A 2-party/thread barrier triggers after both threads invoke await |
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*/ |
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public void testTwoParties() throws Exception { |
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final CyclicBarrier b = new CyclicBarrier(2); |
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Thread t = new Thread(new Runnable() { |
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public void run(){ |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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}}); |
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|
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b.await(); |
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b.await(); |
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b.await(); |
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b.await(); |
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awaitTermination(t); |
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} |
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|
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/** |
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* An interruption in one party causes others waiting in await to |
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* throw BrokenBarrierException |
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*/ |
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public void testAwait1_Interrupted_BrokenBarrier() { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(); |
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}}; |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(); |
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}}; |
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|
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t1.start(); |
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t2.start(); |
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await(pleaseInterrupt); |
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t1.interrupt(); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
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|
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/** |
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* An interruption in one party causes others waiting in timed await to |
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* throw BrokenBarrierException |
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*/ |
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public void testAwait2_Interrupted_BrokenBarrier() throws Exception { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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final CountDownLatch pleaseInterrupt = new CountDownLatch(2); |
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Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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}}; |
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Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
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public void realRun() throws Exception { |
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pleaseInterrupt.countDown(); |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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}}; |
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|
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t1.start(); |
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t2.start(); |
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await(pleaseInterrupt); |
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t1.interrupt(); |
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
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|
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/** |
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* A timeout in timed await throws TimeoutException |
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*/ |
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public void testAwait3_TimeoutException() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(2); |
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Thread t = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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long startTime = System.nanoTime(); |
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try { |
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c.await(timeoutMillis(), MILLISECONDS); |
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shouldThrow(); |
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} catch (TimeoutException success) {} |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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}}); |
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|
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awaitTermination(t); |
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} |
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|
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/** |
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* A timeout in one party causes others waiting in timed await to |
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* throw BrokenBarrierException |
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*/ |
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public void testAwait4_Timeout_BrokenBarrier() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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try { |
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c.await(LONG_DELAY_MS, MILLISECONDS); |
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shouldThrow(); |
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} catch (BrokenBarrierException success) {} |
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}}); |
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Thread t2 = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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awaitNumberWaiting(c, 1); |
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long startTime = System.nanoTime(); |
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try { |
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c.await(timeoutMillis(), MILLISECONDS); |
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shouldThrow(); |
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} catch (TimeoutException success) {} |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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}}); |
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|
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
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|
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/** |
217 |
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* A timeout in one party causes others waiting in await to |
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* throw BrokenBarrierException |
219 |
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*/ |
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public void testAwait5_Timeout_BrokenBarrier() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(3); |
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Thread t1 = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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try { |
225 |
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c.await(); |
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shouldThrow(); |
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} catch (BrokenBarrierException success) {} |
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}}); |
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Thread t2 = newStartedThread(new CheckedRunnable() { |
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public void realRun() throws Exception { |
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awaitNumberWaiting(c, 1); |
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long startTime = System.nanoTime(); |
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try { |
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c.await(timeoutMillis(), MILLISECONDS); |
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shouldThrow(); |
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} catch (TimeoutException success) {} |
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assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
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}}); |
239 |
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|
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awaitTermination(t1); |
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awaitTermination(t2); |
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} |
243 |
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|
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> |
/** |
245 |
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* A reset of an active barrier causes waiting threads to throw |
246 |
> |
* BrokenBarrierException |
247 |
> |
*/ |
248 |
> |
public void testReset_BrokenBarrier() throws InterruptedException { |
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final CyclicBarrier c = new CyclicBarrier(3); |
250 |
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final CountDownLatch pleaseReset = new CountDownLatch(2); |
251 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
252 |
> |
public void realRun() throws Exception { |
253 |
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pleaseReset.countDown(); |
254 |
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c.await(); |
255 |
> |
}}; |
256 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
257 |
> |
public void realRun() throws Exception { |
258 |
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pleaseReset.countDown(); |
259 |
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c.await(); |
260 |
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}}; |
261 |
> |
|
262 |
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t1.start(); |
263 |
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t2.start(); |
264 |
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await(pleaseReset); |
265 |
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|
266 |
> |
awaitNumberWaiting(c, 2); |
267 |
> |
c.reset(); |
268 |
> |
awaitTermination(t1); |
269 |
> |
awaitTermination(t2); |
270 |
> |
} |
271 |
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|
272 |
> |
/** |
273 |
> |
* A reset before threads enter barrier does not throw |
274 |
> |
* BrokenBarrierException |
275 |
> |
*/ |
276 |
> |
public void testReset_NoBrokenBarrier() throws Exception { |
277 |
> |
final CyclicBarrier c = new CyclicBarrier(3); |
278 |
> |
c.reset(); |
279 |
> |
|
280 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
281 |
> |
public void realRun() throws Exception { |
282 |
> |
c.await(); |
283 |
> |
}}); |
284 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
285 |
> |
public void realRun() throws Exception { |
286 |
> |
c.await(); |
287 |
> |
}}); |
288 |
> |
|
289 |
> |
c.await(); |
290 |
> |
awaitTermination(t1); |
291 |
> |
awaitTermination(t2); |
292 |
> |
} |
293 |
> |
|
294 |
> |
/** |
295 |
> |
* All threads block while a barrier is broken. |
296 |
> |
*/ |
297 |
> |
public void testReset_Leakage() throws InterruptedException { |
298 |
> |
final CyclicBarrier c = new CyclicBarrier(2); |
299 |
> |
final AtomicBoolean done = new AtomicBoolean(); |
300 |
> |
Thread t = newStartedThread(new CheckedRunnable() { |
301 |
> |
public void realRun() { |
302 |
> |
while (!done.get()) { |
303 |
|
try { |
304 |
< |
b.await(); |
305 |
< |
b.await(); |
86 |
< |
b.await(); |
87 |
< |
b.await(); |
88 |
< |
} catch(Exception e){ |
89 |
< |
threadFail("unexpected exception"); |
90 |
< |
}}}); |
304 |
> |
while (c.isBroken()) |
305 |
> |
c.reset(); |
306 |
|
|
307 |
< |
try { |
308 |
< |
t.start(); |
309 |
< |
b.await(); |
310 |
< |
b.await(); |
311 |
< |
b.await(); |
312 |
< |
b.await(); |
313 |
< |
t.join(); |
314 |
< |
} catch(Exception e){ |
315 |
< |
fail("unexpected exception"); |
307 |
> |
c.await(); |
308 |
> |
shouldThrow(); |
309 |
> |
} |
310 |
> |
catch (BrokenBarrierException ok) {} |
311 |
> |
catch (InterruptedException ok) {} |
312 |
> |
}}}); |
313 |
> |
|
314 |
> |
for (int i = 0; i < 4; i++) { |
315 |
> |
delay(timeoutMillis()); |
316 |
> |
t.interrupt(); |
317 |
> |
} |
318 |
> |
done.set(true); |
319 |
> |
t.interrupt(); |
320 |
> |
awaitTermination(t); |
321 |
> |
} |
322 |
> |
|
323 |
> |
/** |
324 |
> |
* Reset of a non-broken barrier does not break barrier |
325 |
> |
*/ |
326 |
> |
public void testResetWithoutBreakage() throws Exception { |
327 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
328 |
> |
for (int i = 0; i < 3; i++) { |
329 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
330 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
331 |
> |
public void realRun() throws Exception { |
332 |
> |
start.await(); |
333 |
> |
barrier.await(); |
334 |
> |
}}); |
335 |
> |
|
336 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
337 |
> |
public void realRun() throws Exception { |
338 |
> |
start.await(); |
339 |
> |
barrier.await(); |
340 |
> |
}}); |
341 |
> |
|
342 |
> |
start.await(); |
343 |
> |
barrier.await(); |
344 |
> |
awaitTermination(t1); |
345 |
> |
awaitTermination(t2); |
346 |
> |
assertFalse(barrier.isBroken()); |
347 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
348 |
> |
if (i == 1) barrier.reset(); |
349 |
> |
assertFalse(barrier.isBroken()); |
350 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
351 |
|
} |
352 |
|
} |
353 |
|
|
354 |
+ |
/** |
355 |
+ |
* Reset of a barrier after interruption reinitializes it. |
356 |
+ |
*/ |
357 |
+ |
public void testResetAfterInterrupt() throws Exception { |
358 |
+ |
final CyclicBarrier barrier = new CyclicBarrier(3); |
359 |
+ |
for (int i = 0; i < 2; i++) { |
360 |
+ |
final CyclicBarrier start = new CyclicBarrier(3); |
361 |
+ |
Thread t1 = new ThreadShouldThrow(InterruptedException.class) { |
362 |
+ |
public void realRun() throws Exception { |
363 |
+ |
start.await(); |
364 |
+ |
barrier.await(); |
365 |
+ |
}}; |
366 |
+ |
|
367 |
+ |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
368 |
+ |
public void realRun() throws Exception { |
369 |
+ |
start.await(); |
370 |
+ |
barrier.await(); |
371 |
+ |
}}; |
372 |
|
|
105 |
– |
public void testAwait1_Interrupted_BrokenBarrier(){ |
106 |
– |
final CyclicBarrier c = new CyclicBarrier(3); |
107 |
– |
Thread t1 = new Thread(new Runnable() { |
108 |
– |
public void run(){ |
109 |
– |
try{ |
110 |
– |
c.await(); |
111 |
– |
threadFail("should throw"); |
112 |
– |
} catch(InterruptedException success){} |
113 |
– |
catch(Exception b){ |
114 |
– |
threadFail("should throw IE"); |
115 |
– |
} |
116 |
– |
} |
117 |
– |
}); |
118 |
– |
Thread t2 = new Thread(new Runnable(){ |
119 |
– |
public void run(){ |
120 |
– |
try{ |
121 |
– |
c.await(); |
122 |
– |
threadFail("should throw"); |
123 |
– |
} catch(BrokenBarrierException success){ |
124 |
– |
} catch(Exception i){ |
125 |
– |
threadFail("should throw BBE"); |
126 |
– |
} |
127 |
– |
} |
128 |
– |
}); |
129 |
– |
try { |
373 |
|
t1.start(); |
374 |
|
t2.start(); |
375 |
< |
Thread.sleep(SHORT_DELAY_MS); |
375 |
> |
start.await(); |
376 |
|
t1.interrupt(); |
377 |
< |
t1.join(); |
378 |
< |
t2.join(); |
379 |
< |
} catch(InterruptedException e){ |
380 |
< |
fail("unexpected exception"); |
377 |
> |
awaitTermination(t1); |
378 |
> |
awaitTermination(t2); |
379 |
> |
assertTrue(barrier.isBroken()); |
380 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
381 |
> |
barrier.reset(); |
382 |
> |
assertFalse(barrier.isBroken()); |
383 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
384 |
|
} |
385 |
|
} |
386 |
|
|
387 |
< |
public void testAwait2_Interrupted_BrokenBarrier(){ |
388 |
< |
final CyclicBarrier c = new CyclicBarrier(3); |
389 |
< |
Thread t1 = new Thread(new Runnable() { |
390 |
< |
public void run(){ |
391 |
< |
try{ |
392 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
393 |
< |
threadFail("should throw"); |
394 |
< |
} catch(InterruptedException success){ |
395 |
< |
} catch(Exception b){ |
396 |
< |
threadFail("should throw IE"); |
397 |
< |
} |
398 |
< |
} |
399 |
< |
}); |
400 |
< |
Thread t2 = new Thread(new Runnable(){ |
401 |
< |
public void run(){ |
402 |
< |
try{ |
403 |
< |
c.await(MEDIUM_DELAY_MS, TimeUnit.MILLISECONDS); |
404 |
< |
threadFail("should throw"); |
405 |
< |
} catch(BrokenBarrierException success){ |
406 |
< |
} catch(Exception i){ |
407 |
< |
threadFail("should throw BBE"); |
408 |
< |
} |
409 |
< |
} |
410 |
< |
}); |
411 |
< |
try { |
412 |
< |
t1.start(); |
413 |
< |
t2.start(); |
414 |
< |
Thread.sleep(SHORT_DELAY_MS); |
415 |
< |
t1.interrupt(); |
416 |
< |
t1.join(); |
417 |
< |
t2.join(); |
418 |
< |
} catch(InterruptedException e){ |
419 |
< |
fail("unexpected exception"); |
387 |
> |
/** |
388 |
> |
* Reset of a barrier after timeout reinitializes it. |
389 |
> |
*/ |
390 |
> |
public void testResetAfterTimeout() throws Exception { |
391 |
> |
final CyclicBarrier barrier = new CyclicBarrier(3); |
392 |
> |
for (int i = 0; i < 2; i++) { |
393 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
394 |
> |
Thread t1 = newStartedThread(new CheckedRunnable() { |
395 |
> |
public void realRun() throws Exception { |
396 |
> |
try { |
397 |
> |
barrier.await(); |
398 |
> |
shouldThrow(); |
399 |
> |
} catch (BrokenBarrierException success) {} |
400 |
> |
}}); |
401 |
> |
Thread t2 = newStartedThread(new CheckedRunnable() { |
402 |
> |
public void realRun() throws Exception { |
403 |
> |
awaitNumberWaiting(barrier, 1); |
404 |
> |
long startTime = System.nanoTime(); |
405 |
> |
try { |
406 |
> |
barrier.await(timeoutMillis(), MILLISECONDS); |
407 |
> |
shouldThrow(); |
408 |
> |
} catch (TimeoutException success) {} |
409 |
> |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis()); |
410 |
> |
}}); |
411 |
> |
|
412 |
> |
awaitTermination(t1); |
413 |
> |
awaitTermination(t2); |
414 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
415 |
> |
assertTrue(barrier.isBroken()); |
416 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
417 |
> |
barrier.reset(); |
418 |
> |
assertFalse(barrier.isBroken()); |
419 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
420 |
|
} |
421 |
|
} |
422 |
< |
|
423 |
< |
public void testAwait3_TimeOutException(){ |
424 |
< |
final CyclicBarrier c = new CyclicBarrier(2); |
425 |
< |
Thread t = new Thread(new Runnable() { |
426 |
< |
public void run(){ |
427 |
< |
try{ |
428 |
< |
c.await(SHORT_DELAY_MS, TimeUnit.MILLISECONDS); |
429 |
< |
threadFail("should throw"); |
430 |
< |
} catch(TimeoutException success){ |
431 |
< |
} catch(Exception b){ |
432 |
< |
threadFail("should throw TOE"); |
433 |
< |
|
434 |
< |
} |
435 |
< |
} |
436 |
< |
}); |
437 |
< |
try { |
438 |
< |
t.start(); |
439 |
< |
t.join(); |
440 |
< |
} catch(InterruptedException e){ |
441 |
< |
fail("unexpected exception"); |
422 |
> |
|
423 |
> |
/** |
424 |
> |
* Reset of a barrier after a failed command reinitializes it. |
425 |
> |
*/ |
426 |
> |
public void testResetAfterCommandException() throws Exception { |
427 |
> |
final CyclicBarrier barrier = |
428 |
> |
new CyclicBarrier(3, new Runnable() { |
429 |
> |
public void run() { |
430 |
> |
throw new NullPointerException(); }}); |
431 |
> |
for (int i = 0; i < 2; i++) { |
432 |
> |
final CyclicBarrier start = new CyclicBarrier(3); |
433 |
> |
Thread t1 = new ThreadShouldThrow(BrokenBarrierException.class) { |
434 |
> |
public void realRun() throws Exception { |
435 |
> |
start.await(); |
436 |
> |
barrier.await(); |
437 |
> |
}}; |
438 |
> |
|
439 |
> |
Thread t2 = new ThreadShouldThrow(BrokenBarrierException.class) { |
440 |
> |
public void realRun() throws Exception { |
441 |
> |
start.await(); |
442 |
> |
barrier.await(); |
443 |
> |
}}; |
444 |
> |
|
445 |
> |
t1.start(); |
446 |
> |
t2.start(); |
447 |
> |
start.await(); |
448 |
> |
awaitNumberWaiting(barrier, 2); |
449 |
> |
try { |
450 |
> |
barrier.await(); |
451 |
> |
shouldThrow(); |
452 |
> |
} catch (NullPointerException success) {} |
453 |
> |
awaitTermination(t1); |
454 |
> |
awaitTermination(t2); |
455 |
> |
assertTrue(barrier.isBroken()); |
456 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
457 |
> |
barrier.reset(); |
458 |
> |
assertFalse(barrier.isBroken()); |
459 |
> |
assertEquals(0, barrier.getNumberWaiting()); |
460 |
|
} |
461 |
|
} |
198 |
– |
|
462 |
|
} |